// Copyright 2022 PingCAP, Ltd.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#pragma once

#include <Core/Types.h>

#include <mutex>

namespace DB
{
namespace DM
{
namespace tests
{
class IDGenerator
{
public:
    IDGenerator()
        : id{0}
    {}

    UInt64 get()
    {
        std::lock_guard guard{mutex};
        return id++;
    }

private:
    std::mutex mutex;
    UInt64 id;
};
} // namespace tests
} // namespace DM
} // namespace DB
